[R] vectoring a simple for
Ray Brownrigg
ray at mcs.vuw.ac.nz
Mon Nov 25 22:53:20 CET 2002
> Supose that I have a vector beta <- c(1,2,3)
> I need a vector which indice i be beta[i]*sum(beta[-i])
> For example,
> result <- rep(0,3)
> for(i in 1:3) result[i] <- beta[i]*sum(beta[-i])
> result
> [1] 5 8 9
> How I do it with no for?
>
How about:
beta*(sum(beta) - beta)
?
Hope this helps,
Ray Brownrigg <ray at mcs.vuw.ac.nz> http://www.mcs.vuw.ac.nz/~ray
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